New To RegEx

I'm new to the power of regular expressions.

I'm trying to write two expressions:

1) matches on 77
2) matches on anything but 77

For #1 two I have:
77?

The test cases for #1 are:
63 = false
null = false
whitespace = false
77177 = false
177 = false
771= false
77 = TRUE

Test cases for #2 are:
63 = true
null = true
whitespace = true
77177 = true
177 = true
771= true
77 = FALSE

Thanks!


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To match 77, the regex should just be 77

To match anything but 77, this is best done in code by doing
a match
on 77 and negating match.

On Aug 30, 2:46 pm, JLL <jacob....gmail.com> wrote:
> I'm new to the power of regular expressions.
>
> I'm trying to write two expressions:
>
> 1) matches on 77
> 2) matches on anything but 77
>
> For #1 two I have:
> 77?
>
> The test cases for #1 are:
> 63 = false
> null = false
> whitespace = false
> 77177 = false
> 177 = false
> 771= false
> 77 = TRUE
>
> Test cases for #2 are:
> 63 = true
> null = true
> whitespace = true
> 77177 = true
> 177 = true
> 771= true
> 77 = FALSE
>
> Thanks!


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Thanks Russ

I need to ensure the whole string is only 77.

So the string '77177' would be true if the expression was
just 77.

I need it to be false for the '77177' test case and only
true for
'77'.


On Aug 30, 1:50 pm, russ <black.russ...gmail.com> wrote:
> To match 77, the regex should just be 77
>
> To match anything but 77, this is best done in code by
doing a match
> on 77 and negating match.
>
> On Aug 30, 2:46 pm, JLL <jacob....gmail.com> wrote:
>
> > I'm new to the power of regular expressions.
>
> > I'm trying to write two expressions:
>
> > 1) matches on 77
> > 2) matches on anything but 77
>
> > For #1 two I have:
> > 77?
>
> > The test cases for #1 are:
> > 63 = false
> > null = false
> > whitespace = false
> > 77177 = false
> > 177 = false
> > 771= false
> > 77 = TRUE
>
> > Test cases for #2 are:
> > 63 = true
> > null = true
> > whitespace = true
> > 77177 = true
> > 177 = true
> > 771= true
> > 77 = FALSE
>
> > Thanks!


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so you want:  ^77$
?

On Aug 30, 4:58 pm, JLL <jacob....gmail.com> wrote:
> Thanks Russ
>
> I need to ensure the whole string is only 77.
>
> So the string '77177' would be true if the expression
was just 77.
>
> I need it to be false for the '77177' test case and
only true for
> '77'.
>
> On Aug 30, 1:50 pm, russ <black.russ...gmail.com> wrote:
>
> > To match 77, the regex should just be 77
>
> > To match anything but 77, this is best done in
code by doing a match
> > on 77 and negating match.
>
> > On Aug 30, 2:46 pm, JLL <jacob....gmail.com> wrote:
>
> > > I'm new to the power of regular expressions.
>
> > > I'm trying to write two expressions:
>
> > > 1) matches on 77
> > > 2) matches on anything but 77
>
> > > For #1 two I have:
> > > 77?
>
> > > The test cases for #1 are:
> > > 63 = false
> > > null = false
> > > whitespace = false
> > > 77177 = false
> > > 177 = false
> > > 771= false
> > > 77 = TRUE
>
> > > Test cases for #2 are:
> > > 63 = true
> > > null = true
> > > whitespace = true
> > > 77177 = true
> > > 177 = true
> > > 771= true
> > > 77 = FALSE
>
> > > Thanks!


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I like quickrex -- it's free
http://www.bastian-bergerhoff.com
/eclipse/features/web/QuickREx/standalone.html

On Aug 30, 7:04 pm, "Rick Quatro"
<rickqua...gmail.com> wrote:
> I recommendhttp://www.regul
ar-expressions.info/
>
> For a useful Regex tool, tryhttp://www.regexbuddy.com
>
> Rick
>
> > Do you have a link that you find helpful on
RegEx?


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[^^77$] is not the opposite of ^77$

[^^77$] will match any single character that is not a
caret, 7 or
dollar sign.

There's not really a negation syntax for regular
expressions.  The
[^stuff] pattern is for creating character classes that
exclude
certain characters.  As I said before, the best way to match
strings
that don't match an expression is in code.

In Java, you'd use a ! (not) operator, like this:

!string.matches("^77$")

In Perl you'd use the !~ operator, like this:

string !~ /^77$/

What language are you using?

On Aug 30, 6:04 pm, "Jacob LL" <jacob....gmail.com> wrote:
>
> So would the opposite be:
> [^^77$]
>
> On 8/30/07, nschub...gmail.com <nschub...gmail.com> wrote:
>
> > so you want:  ^77$
> > ?


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I've been using "The Regulator" : http://tools.osherove.com/CoolTools/TheRe
gulator/tabid/185/Default.aspx

On Aug 30, 8:04 pm, "Jacob LL" <jacob....gmail.com> wrote:
> Thanks
>
> I see, so this says...
>
> Starts (^) with (77) and ends ($) with 77.
>
> Do you have a link that you find helpful on RegEx?
>
> So would the opposite be:
> [^^77$]
>
> Thanks
>
> On 8/30/07, nschub...gmail.com <nschub...gmail.com> wrote:
>
>
>
> > so you want:  ^77$
> > ?
>
> > On Aug 30, 4:58 pm, JLL <jacob....gmail.com> wrote:
> > > Thanks Russ


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